Drier



Nov. 7, 1933. H. ROSENBERG 1,934,149

DRIER Filed June 17, 1930 3 Sheets-Sheet l g wmwr o1,

HEYMAN Rnsammg,

Nov. 7, 1933.

H.ROSENBERG DRIER Filed June 17, 1930 5 Sheets-Sheet 2 HEYMAN RuariwaEgg,

Nov. 7, 1933.

Filed June 17, 1930 FIG. 3.

3 Sheets-sheaf 5 Swank);

HEYMAN RUEENBEE,

Patented Nov. 7, 1933 usrrso srArsseArsNr orrics DRIER ltleyman Rosenberg, New York, N. Y.

Application June 17, 1930. Serial No. 461,762

7 Claims. (Cl. 34-34) expeditious,

eliminating moisture from interior portions as effectively as from more exposed portions without agitation of the articles.

With these and further objects in view as will in part hereinafter become apparent and in part be stated, the invention includes a hopper or like appropriate drying-agent container, a foraminous work container therein, a discharge for the work, and intake and exhaust means for drying agent to and from the former container.

The invention also includes in such an apparatus a foraminous, pivotally-mounted bottom section for the work container and means for swinging said section to and from a closed position with respect to the work container.

The invention also comprises certain other novel constructions, combinations, and arrangements of parts as subsequently specified and claimed.

In the accompanying drawings,

Figure 1 is a view in side elevation of a drier embodying the features of the present inven- .tion, parts being broken away and parts being seen in section.

Figure 2 is a view similar to Figure 1, the

plane of observation being at, right angles to that of Figure 1, and the hot blast pipe being seen broken away. s

ure 3 is a top plan View of the parts seen in Figures 1 and 2, the hood being indicated in dotted lines in its open position.

Referring to the drawings by numerals, 1, 1 indicate any appropriate frame, standards or other support on which is mounted the circulaginal ring 5 preferably of angle bar construction having a horizontal flange overlapping plate 3 and fixed thereto by screws or like appropriate anchorage devices 6. The inner peripheral portion of cover plate 3 is preferably offset or rab- 6o beted in its upper surface to accommodate the outstanding flange of ring 5 while allowing the upper surface of said flange to lie substantially flush with the upper surface of the plate 3.

Chamber or hopper 2 thus forms a surrounding casing for container 4.

A hood '7 rests on the plate 3 and surrounds the area immediately above the upper end of work container 4. A handle 3 is preferably provided for facilitating manual manipulation 7c of the hood 7. Hood 7 converges upwardly to receive the lower end of a hot blast conduit or pipe 9 leading to and discharging in'the upper end of the hood 7 from any appropriate source f hot air under pressure or like drying medium, which source is not illustrated, but may consist of any appropriate or acceptable furnace, such as a, gas heater and, blower, or an electricalv heater, or other means of providing hot air or like hot, gas under pressure. Fixed to and upstanding from the plate 3 at one point is a standard 10,,the upper end of which terminates in a ring 11 to which the oncoming section of the hot blast pipe 9 is fixed. That section of the pipe 9 between the ring 11 and hood Z'has a slip joint into the hood and is hinged to ring 11, as by ears 12, 12, carried by the section of hot blast pipe, and ears 13, 13 outstanding the ring 11 and pivotally connected to ears 12 by pintle 14. Thus, the hood 7 and the section or pipe 9 connected with the hood are adapted to be swung on the hinged connection with ring 11 from the full line position of Figure 1 to the dotted line position thereof and return to afford opportunity for the delivery of a fresh charge of work to the container 4. As hood is preferably of cast metal, its weight is, of course; not sustained by hinge 12, but instead the hood is lifted manually and swung across plate 3 to and from the open position as seen in dotted lines in Figure 3. Of course, during operation, the supply of hot blast through pipe 9 will be cut off by an appropriate valve, not illustrated, before the hood 7 is swung to its i open position, which is the dotted line position in Figure 3, and will be turnedon, again after the hood has been returned.

plate 3 is preferably made of two semisections as seen in Figure 3, and the 1% container or hopper '2 is provided at its upper edge with an outstanding flange on which plate 3 rests and to which the sections of said plate are preferably detachably fixed, as by appropriate bolts 15, 15 penetrating the plate 3 and threading into the outstanding flange of container or hopper 2.

The lower portion of hopper 2 converges to provide the hopper eiiect and preferably varies in cross section from the circle of the upper portion of the hopper to a square or quadrangle at the lower portion of the hopper.

The inner or work container 4 likewise is circular in cross section at its upper portion and converges downward to a lower end portion which is substantially square in cross section. The lower margin of the hopper or inner container 4 is bordered by a reenforcing plate 16 and closed by a foraminous bottom section or trap 17, the latter being carried by a cross shaft 13 extending through and journaled in bosses 19, 13 outstanding laterally from hopper 2.

The outer container or hopper 2 converges downwardly to a lower end portion 20, which terminates in a discharge chute 21. The lower end portion 20 is spaced below the lower end of the inner or work-containing hopper 4 a distance suificient to allow the required swinging movement of the bottom section or trap 17, and thearea through which the section 17 swings is preferably surrounded or enclosed for foraminous walls 22, 22 fixed to the bottom portion or converging portion of the work container 4 and extending down and preferably detachably fixed to inner portions of the bottom 20 of hopper 2. The said walls 22 efiectively confine discharging articles of work against dislodgment out of the path of discharge.

An operating lever or handle 23 is detachably mounted on an extended portion of shaft 18 and connected thereto against relative rotation, so that, when the handle or lever 23 is swung, the shaft 18 will be likewise oscillated. The upper end of lever or handle 23 is preferably provided with an appropriate grip 24 to which is pivoted a trip lever 25 engaging a detent plunger 26 located to detachably enter and interlock with an appropriate aperture in aretaining plate 27. Trip lever 25 is stressed by an appropriate contractile spring 28 for constantly subjecting the detent pin 26 to a stress tending to retain the pin seated in the recess in plate 27. Pin 26 extends through lever 23 from trip lever 25 to plate 27. Trip lever 25 is so located with respect to grip 24 as to be naturally grasped when the grip 24 is engaged by the hand of the operator. Thus, in substantially one action the operator grips trip lever 25, releases detent pin 26, and swings the lever 23 for rocking shaft 18 and thus swinging the bottom section 17 from its closed or upper position to its op n or lower position, and as soon as a supply of work being treated has discharged by gravity from the bottom section. 17, the operator swings lever 23 back to the full line position of Figure 1, and the parts are ready for a further charge.

Chute 21 is formed at its under face with a discharge opening 29 communicating with a discharge pipe 30. A foraminous plate 31 covers he opening 29 so as to prevent passage oi articles of work into the opening 29. t be observed that the opening 29 and its discha pipe 33 are of considerably less cross sectional area than that of the intake or blast supply pipe I), so that the incoming heated medium, while free to constantly exhaust through pipe 30, can' not escape as fast as it enters, and thus an appropriate pressure is maintained within the circulation container or hopper 2. The fact that exhaust can continue to occur insures constant movement of the contained air. Also, the location of the discharge opening 29 afiords opportunity for ready drainage of any moisture dripping from work to the bottom 20 of hopper 2.

The lower end of the discharge chute 21 is closed normally by a door 32, pivoted at 33, and counterbalanced at 34 for being maintained gravity closed. The counterbalance, however, is sufficiently light to allow the door to swing open to the dotted line position of Figure 1 when the door is struck by a batch of discharging work. The work discharged may be delivered to any appropriate means of distribution, one form of which consists of a container 35 disposed beneath the chute 21 and adapted to be manually removed and replaced. Any other appropriate to n of conveyor may be employed at this point when and as found desirable.

In operation, the handle 8 is grasped and the hood 7 swung from the closed'position shown in full lines in Figure 3'to the open position indicated in dotted lines. A batch of work is then dropped into the work container or inner hopper 4 with the lever 23 in its upright position and the bottom section 17 therefor closed against the lower end of the hopper 4. The hood '7 is then swung back to the position closing hoppers 2 and 4, and the hot blast is turned on through supply pipe 9. The advancing hot air or other gas passes down through the foraminous hopper 4 and out through the various openings thereof into the hopper 2 and down toward the exhaust or discharge opening 29. As much of the hot air as can do so escapes through the discharge opening 29, the balance remaining and creating a pressure within the hopper 2 and causing ,circulation of air therein. The work located in the hopper 4 is thoroughly penetrated by the hot air and the moisture picked up from the aticles of work, leaving the work in a dry and satisfactory condition. Such work may, for instance, be articles which have just been subjected to a galvanizing bath or to other treatment for improving or increasing'surface resistance to rust or other injury, and the passage of the air will remove the moisture from such articles without in any way injuriously affecting the substances present on the surface of the articles incident to such treatment. The removal of some of such substances by moving parts of driers requiring movement is b t-io'n which does not inhere in the present ove apparatus. After the batch or quantity work has been dried to the extent required, which will be readily determined by test for each particular kind of work, the operator releases the batch from the hopper 4 by manipulating the lever as above described, and the batch discharges by gravity from bottom section 17 in its lowered position. The discharging work strik door: 32 swings the door open and thereby elt free to descend into the container 35 or onto any appropriate conveyor. As soon as the work has escaped, the door 32 swings. back by gravity under the influence of the counterbalance 34 the closed position, whereby the circulating hopagain sealed against the escape of air except through the discharge opening 29. Of course, the operator may and usually will out oi? the air supply from the intake pipe 9 while against rust during that period between out removal of the coating solids.

discharging work from hopper 4 and while supplying another batch of work thereto.

While discharge opening 29 is essentially for the escape of air, it also serves, as above indicated, for drainage of free moisture, and as the work must not contact with freemoisture while discharging, the exit 29 is formed first as a thin chamber 29 at the juncture with the chute 21, which chamber merges into the main body of the discharge pipe 29. Chamber 29' extends upward, as clearly seen in Figure 1, far enough to underlie the lower portion of bottom section 1'! when the latter is in the discharging position. It should be understood, of course, that all of the free moisture will have drained off from the work sometime before section 17 is to be lowered for discharging, and that the free moisture in escaping finds entrance to the discharge pipe 29 at the extreme upper edge of chamber 29'; but if any free moisture should for any reason linger in chamber 29 up to the time of the discharge, the lappin of the free portion of bottom sectionl'l past and below the upper .part of chamber 29' insures discharge of work only on thoroughly dry walls, including the perforated plate or screen 31.

It is noted thatthe blast from pipe 9 enters through the center of the top of the hood 7 and is, therefore, directed downupon the nass in the hopper l l chiefly centrally thereof, and thus portions of the current which spread cannot escape into hopper 1 except through hopper 4. Though some of the air current passes laterally out of hopper 4, most of it penetrates the mass or" work, and that portion which escapes laterally is circulated downward and beneath the work in cont ct therewith. The mounting of the ioraminous work container 4 within the imperiorate housing or hopper 1 is such that the air escaping at a less rate through exhaust 29 than the rate of entrance through intake pipe 9 will have opportunity to freely circulate about all sides and beneath the work container 4, and, therefore, movement of the drying air in contact with the contained work on all sides and every angle is assured.

The apparatus is well adapted for drying numerous forms of small articles, such as nuts, bolts, screws, rivets, buck es, buttons, and the like, or any other small articles which are moistened either in the course of construction or in being compleed and require expeditious drying.

The weight 34 for the door 32 is suflicient for normally maintaining the door closed against the pressure of the contained air so as to prevent leakage and allow; escape of air to occur solely through the discharge 29.

In the manufacture of small articles, difficulty has been experienced in preserving the same the time of manufacture the time or" delivery to the consumer. Such a cicles as screws, bolts, and the like, if rusted on the shelves of the jobber or retailer arenot as satisfactory to the consumer not as readily saleable. It been proposed to coat, laquer, oil or otherwise treat such articles to provide temporary protection against oxidation, and in the use of the present improved drier I propose to treat such small metal articles with an oleaginous solution des ined to efifectively temporarily protect rusting, but one of the problems incident to such treatment is the. removal of the mo the surface of the articles after treatment with Driers which require agitation or appreciable movement of the articles to enhance orrender efiective the drying action tend-to throw oii the coating substances with the. moisture and thus to leave the articles in practically the condition they were in before treatment in the oleag'inous bath. The present improved apparatus enablesthe removal ofjtheinoisture in an effective manner without loss of any of the preserving materials from the surface of the articles of work. In the preferred mode'or art of drying such articles of work, the articles are .heldin the reticulated or inner -container in a stationary condition while the heated ai otherhot blast descends directiy upon them, and a certain portion of such blast is allowed to move on down and out through the exhaust opening. The exhaust, however, being too small fori exhaust-ion at the rate of inflow, a

pressure is set up which plus the. advancing movement incident to a partial exhaust causes the-dryin'gmedium to advance through the mass of work and effectively dry the whole mass including innermost articles even though the container .4 is completely filled with work, and this drying operation. is accomplished expeditiously and with no. tendency whatever toward removal of the coating or preserving surface of the work.

What is claimed is: 1

l. The combination of a reticulated container for work to be dried including a reticulated bottom section for the container and a casing, surrounding the container a pivotal support for said bottom section, means for swinging the bottom section on said pivot to and from a position closing the bottom of the work contamer, means for. causing a gaseous heating media to approachand contact with the work from all directions, and means for creating positive or static pressure of the heating media against the work while permitting movement of the media relative to the Work.

2. The combination of a hopper imperforate save for an exhaust opening, intake and discharge openings, means for delivering a hot blast into the hopper through the intake opening under pressure generated preceding the intake, means for normally closing the discharge opening against leakage of the pressure of said blast, and a work container disposed in the path of the blast, the work container being located above the discharge opening and having a movable wall adapted to be moved from a position closing the work container to a discharging position directing work by gravity toward the discharge opening.

3. The combination of a hopper imperforate save for an exhaust opening, an intake, and discharge openings, means for delivering a hot blast into the hopper through the intake opening, means for normally closing the discharge opening against leakage of the pressure of said blast, and a work container disposed in the path of the blast, the work containerbeing located above the discharge opening and having a movable wall adapted to be moved from a position closing the work container to a discharging position directing work by gravity toward the discharge opening, and a cover grid for the exhaust opening located to receive and direct discharging work to the discharge opening.

4. The'combination of a hopper imperforate save for an exhaust opening, an intake, and discharge openings, means for delivering a hot blast into the hopper through the intake openmaterials" on the ing, means for normally closing the discharge opening against leakage of the pressure of said blast, and a work container disposed in the path of the blast, the work container being located above the discharge opening and having a movable wall adapted to be moved from a position closing the work container to a discharging position directing work by gravity toward the discharge opening, and a cover grid for the exhaust opening located to receive and direct discharging work to the discharge opening, the exhaust opening having an entrance chamber extending beneath said grid upward sufiiciently to lap the lowermost portion of the movable wall of the work container when said wall is in the discharging position.

5. The combination of a hopper having an in take, a work discharge chute therefor, means for normally closing said chute against pressure exhaust, means preceding the intake for delivering drying media under pressure to said hopper in the direction of advance of work toward the discharge chute, an exhaust pipe communicating with the chute above the closure thereof, a work container in said hopper, and means for directing discharging work from said work container across the line of exhaust of drying media on its way to the exit of the chute.

6. The combination of a pressure housing having an intake, a hood located above the housing and movable to and from a position in connection with said housing, means preceding the housing intake and discharging into the hood for delivering a hot blast through the hood into the housing, a reticulated work container in the path of said blast, means for movably supporting a section of said work container for enabling the same to be moved to and from a discharging position, the housing having a'work discharge'opening below the reticulated container, and means for controlling exhaust of the hot blast for maintaining a pressure in the housing above mere passing contact of the blast with the work. I

7. The combination of a pressure housing, a hood movable to and from a position in connection with said housing, means preceding the hood for delivering a hot blast through the hood into the housing, a reticulated work container in the path of said blast, means for movably supporting a section of said Work container for enabling the same to be moved to and from a discharging position, a discharge chute for the housing below the work container and means for controlling exhaust of the hot blast for maintaining a pressure in the housing above mere passing contact of the blast with the work.

HEYMAN ROSENBERG. 

